#include<stdio.h>

struct square {
    int length;
    int width;
};

int area(int, int);

int main() {
    struct square square = {20, 10};
    // Passing Structure Members
    printf("area : %d\n", area(square.length, square.width)); // area : 200
    return 0;
}

int area(int l, int w) {
    return l * w;
}